<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            class="button-wrapper"
            v-for="item of hot"
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div
        class="area"
        v-for="(item, key) of cities"
        :key="key"
        :ref="key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="iconItem of item"
            :key="iconItem.id"
            @click="handleCityClick(iconItem.name)"
          >
            {{iconItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'

export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper, {
      click: true
    })
  }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
      &:before
        border-color #cccccc
      &:after
        border-color #cccccc
    .border-bottom
      &before
        border-color #777777
    .list
      overflow hidden
      position absolute
      top 1.58rem
      right 0
      bottom 0
      left 0
      .title
        background-color #eeeeee
        font-size .26rem
        line-height .54rem
        color #666666
        padding-left .2rem
      .button-list
        overflow hidden
        padding .1rem .6rem .1rem .1rem
        .button-wrapper
          width 33.33%
          float left
          .button
            padding .1rem 0
            margin .1rem
            border .02rem solid #cccccc
            border-radius .06rem
            text-align center
      .item-list
        .item
          line-height .76rem
          padding-left .2rem
</style>
